
Ultima Compact™
Chillers
15
Ultima Compact 30-150kW Technical Manual 9690553 V1.2.0_10_2019
Unit Remote ON/OFF
Disables / Enables the unit remotely.
Compressor Anti Cycle Control
Automatic via the Microprocessor.
Compressor Load Limit
This feature limits the condensing pressure to 37 Barg by unloading the compressor.
Low Suction Trip
The relevant circuit turns off when the suction pressure gets too low, to prevent hitting the LP switch.
Supply Temperature Limiting
Based upon the freezing point of the water/ glycol solution, the unit operation is limited to a 3K differential. Cooling is
reduced as the temperature approaches the freezing point (below this differential). The differential is the difference
between actual temperature and the freezing point of the solution.
Pump(s) Remote ON/OFF
Disables / Enables the pump(s) remotely.
Evaporator Differential Pressure Sensor
Shall facilitate low flow limiting and pressure drop monitoring via the microprocessor.
Remote Setback Temperature Set-point Switch
A setback set-point for supply water temperature shall be selected to suit summer / winter conditions or night setback.
Remote Set-point Adjust
Shall allow the chilled water set-point to be adjusted via an external 0-10V signal.
Compressor Hours Run
Displays hours run of each compressor.
Optimised Head Pressure Setpoint Management
The combination of variable speed compressor, EC fan and interactive control logic allows fans to be slowed down to
give the optimum head pressure setpoint in relation to combined power draw of compressor and fans. The fan speed
shall automatically modulate to achieve the best energy balance for all normal operating conditions. Reducing the head
pressure setpoint decreases the compressor input power at the expense of the fan input power.
To change the PIN number; please contact Airedale at time of order with the preferred 4 digit
number.
IMPORTANT
Password Protection
The control system integrity shall be maintained by restricting access with a password PIN number.
CAUTION
Introduction